Closure packing for caps



' 1954 E. o. FROITZHEIM CLOSURE PACKING FOR CAPS Filed April 15, 1951Patented Aug. 17, 195 4 UNITED STATES PATENT OFFICE CLOSURE PACKING. FOECAPS Ernst Otto Froitzheim, Koln-Ehrenfeld, Germany Application April13, 1951-, Serial No. 220,752

Claims priority, application Germany May 24, 1950 2 Claims. I

This invention has reference generally to improvements in receptacleclosures and, more particularly, relates to a closure packing for caps,covers, or the like, of bottles, hollow glasses, cans, and otherreceptacles.

It is one of the objects of the invention to provide a device of theabove character in which a packing disc is permanently secured in thecover for a bottle, can, or other receptacle, and at the same time toconstruct the mouth of the receptacle so that it will coact with thepacking and seal the contents of the bottle without contacting the partwhich acts to permanently fix the packing disc in position.

It is known to place in bottle covers made of metal, artiflical metal,or the like, packing discs for complete separation between the bottleneck and cover. These packing discs may be made of cork, cardboard,rubber, or like material.

It is also known to either force these packing discs very tightly intothe covers or to secure them in the cover by an adhesive or to performboth actions simultaneously but the packing discs usually become loosedue to continuous engagement with the mouth of the bottle when theflanged cover is being screwed into position on the bottle neck orremoved therefrom. In other words, during repeated opening and closingof the cover the packing discs are always subjected to pressure andturning motion and become deformed.

This deformation results in loosening of the packing disc from the coverin spite of the adhesive securing the disc.

The present invention has for one of its objects to remove thesetechnical disadvantages by employment of a special holding ring. Thesecuring of the packing disc in the cover by an adhesive may bedispensed with. Moreover, the packing disc may now have a smallerdiameter than the inner diameter of the flanged cover and therebyenabling the expanding under the pressure of the bottle neck withoutundesired deformation.

This holding ring is so arranged that it is not contacted by the bottleneck and not subject to any pressure.

The holding ring is tightly pressed with a tight fit into the coverafter previous introduction of the packing disc with or without acovering sheet. The holding ring may also be provided at the outermargin with projections assuring of an especially firm mounting.

It is an additional and equally important object of the invention toconstruct the bottle neck so that it will not under any circumstancecontact the holding ring but on the contrary seal against the innercentral portion of the packing disc.

Other objects, as well as the nature, characteristic features, and scopeof the invention will be more readily apparent from the followingdescription taken in connection with the accompanying drawings andpointed out in the claims forming a part of this specification.

The invention is clearly illustrated in the accompanying drawings, inwhich:

Figure 1 is a vertical sectional view of one form of the invention asapplied to a perfume bottle, and

Figure 2 is a plan view of the holding ring per se.

Referring now more particularly to the accompanying drawings, there isprovided a bottle 5 the outer end of which is formed with a neck 6 whichis provided with external threads I. The neck terminates at its outerend in a dome-like portion 8, the outer surface of which is tapered anddefines a frustrum of a cone. At the outer end of the cone and on theouter surface two concentrically arranged, annular and spaced ribs 9 areprovided which when the flanged cover In with the packing disc llprovided therein are crewed on to the neck penetrate with increasedpressure the adjacent surface of the packing disc, thereby providing aneffective sealing of the contents. Concentrically and within theinnermost ring the bottle is provided with a mouth or opening I2 throughwhich the contents can be dispensed after the cover has been removed.

The holding ring I3, characteristic of the invention and also shown indetail in Figure 2, has an internal diameter indicated by the arrows andthe numeral Ill of a size preventing any contact between the holdingring and the bottle eck. At the outer periphery it is provided with aseries of projections I5 which under light but reliable pressure abutthe inner surface of the flange of the cover so that the holding ringeven after long use lasts in a reliable manner and cannot become axiallydisplaced in the cover or loosen itself therefrom.

It is believed in view of the foregoing that a further detaileddescription of the operation of the invention is entirely unnecessary.Likewise it is believed that the advantages of the invention will bereadily apparent.

Having thus fully described the invention what is claimed as new anddesired to be secured by Letters Patent is:

1. A screw threaded closure for containers comprising a plane top, anintegral downwardly depending generally cylindrical skirt havingsuitable screw threads therein, a packing disc of soft resilientmaterial on the under face of said top and fully covering same, and aflat retaining ring positioned on the exposed face of said packing discand having a series of radially extending projections thereon forming acontinuous outer sinusoidal circumference of the ring with saidprojections resiliently engaging the inner wall of the skirt of said capfor holding the packing disc in place.

2. A bottle and closure therefor, said bottle having a neck comprised bya cylindrical section having suitable screw threads on the outerperiphery, said neck terminating at its top in a frusto-conical sectionhaving a plane lower base merging into an inwardly and upwardly inclinedside wall, an upper base having a central 20 hole therethrough, and acircular groove V- shaped in cross-section in said upper base having oneside at the top of the inwardly and upwardly inclined side wall and theother side adjacent said central hole, and said closure comprising a 2,

plane top, an integral downwardly depending generally cylindrical skirthaving screw threads therein complementary to the screw threads on thecylindrical section of the bottle neck, a packing disc of soft resilientmaterial on the under face of said top and fully covering same, and afiat retaining ring having an internal diameter greater than that of theV-shaped groove in the top positioned on the exposed face of the packingdisc and having a series of radially extending projections thereonforming a continuous outer sinusoidal circumference of the ring withsaid projections resiliently engaging the inner wall of the skirt ofsaid cap for holding the packing disc in place.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 979,183 Mackin Dec. 20, 1910 1,137,725 Carvalho Apr. 27, 19151,788,129 Stephenson Jan. 6, 1931 2,039,757 Von Till May 5, 19362,058,214 Cohn Oct. 20, 1936 2,080,144 Lufkin May 11, 1937 2,142,380Sharp Jan. 3, 1939 FOREIGN PATENTS Number Country Date 651,875 FranceOct. 15, 1928 513,830 Great Britain Jan. 11, 1938 355,832 Italy Jan. 18,1939

